Williams County

Formed 12 Feb 1820, 421 square milesParent county: Defiance

Evolution of county from date of formation until it assumed its final form1 Apr 1820: Erected and attached to Wood until organized2 Feb 1824: Organized. Paulding, Henry, and Putnam attached temporarily until organized3 Jan 1834: Diminished by organization of Putnam26 Dec 1834: Diminished by organization of Henry18 Mar 1839: Diminished by organization of Paulding7 Apr 1845: Diminished by formation of Defiance1 Apr 1850: Diminished by formation of Fulton

Two county seats have been in Williams County. The first located in Defiance (Defiance County) from 1820-1841. The second, the current county seat, Bryan in 1841.